Write the function of a (1) transducer and (2) repeater in a communication system
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(i) Transducer : It is a device which coverts end from one form to another form . eg : Microphone
(ii) Repeater : It is a combination of receiver, amplifier and transmitter. It picks up a signal from the transmitter , amplifies and transmit to the receiver sometimes with a change of carrier frequency .
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